Both coatings make a hard, seamless floor. They differ in price, working time, and how they handle sunlight. The comparison below uses real product data sheets, so you can see the numbers behind the sales claims.
Direct Answer
Epoxy costs less, gives you more working time, and suits a careful DIY install. Polyaspartic costs about $1 to $2 more per square foot installed, can take vehicles in about a day, and resists yellowing. Choose polyaspartic for a sunlit garage or a fast turnaround, and epoxy for a shaded floor on a tighter budget.
Takeaways
Installed prices are the U.S. national ranges used in our floor cost calculator. Timing comes from one published product on each side, so read it as a real example and check the data sheet for the product you are quoted.
| Factor | Epoxy | Polyaspartic |
|---|---|---|
| Installed cost per sq ft | $4 – $10 | $5 – $12 |
| Working time | 45 – 55 min on the floor at 77°F, 30 min in the pail | About 20 – 30 min at 77°F |
| Recoat window | 8 – 24 hours at 68°F | About 2 – 24 hours |
| Foot traffic | 24 hours at 68°F | About 4 – 6 hours |
| Vehicles | 72 hours for light vehicles | About 24 hours |
| Full cure | 7 days at 68°F | About 72 hours |
| Sunlight | Discolors under regular UV exposure | UV stable, resists yellowing |
| DIY fit | Reasonable on a dry, sound slab | Hard, because the mix sets quickly |
| Typical lifespan | 3 – 20 years, depending on the system | 10 – 20+ years |
Epoxy timing: Sikafloor-200 Garage Epoxy Kit. Polyaspartic timing: APF Polyaspartic 7500 Low Odor. Lifespans: HomeGuide (2026). Other products differ. Bob Vila reports polyaspartic that starts to set in about 10 minutes.
Polyaspartic adds about $1 to $2 per square foot at the published ranges, or roughly 21% at the midpoints. On a garage floor that usually means a few hundred dollars. You can test your own size and floor condition in the epoxy garage floor cost calculator.
| Garage | Area | Pro epoxy | Pro polyaspartic |
|---|---|---|---|
| 1-car (12 × 24 ft) | 288 sq ft | $1,152 – $2,880 | $1,440 – $3,456 |
| 2-car (20 × 20 ft) | 400 sq ft | $1,600 – $4,000 | $2,000 – $4,800 |
| 2-car (24 × 24 ft) | 576 sq ft | $2,304 – $5,760 | $2,880 – $6,912 |
| 3-car (24 × 36 ft) | 864 sq ft | $3,456 – $8,640 | $4,320 – $10,368 |
U.S. national averages for a floor in good condition. The polyaspartic range assumes a flake floor, so ask for the same finish when you compare two quotes.
It can be, if it lasts longer. At the midpoint prices, polyaspartic has to last only about 21% longer than epoxy to match its cost per year. The table shows a 400 sq ft floor at those prices. The lifespans are assumptions, so swap in the warranty terms from your quotes.
| Coating | Midpoint price | If it lasts | Cost per year |
|---|---|---|---|
| Epoxy | $2,800 | 10 years | $280 per year |
| Epoxy | $2,800 | 15 years | $187 per year |
| Polyaspartic | $3,400 | 15 years | $227 per year |
| Polyaspartic | $3,400 | 20 years | $170 per year |
Illustrative arithmetic, not a durability test. Lifespan depends on prep, traffic, and sunlight.
Usually, in a bright garage, because it does not yellow. For overall life the evidence is weaker than the marketing suggests. We found no independent long-term test, and published figures disagree: Bob Vila gives epoxy 10 to 20 years in one article and 5 to 10 in another, while Concrete Network says polyaspartic can pass 15 years when installed well. Most other numbers come from companies selling one of the two.
Speed is the reason to buy polyaspartic and also the reason it is hard to install. Concrete Network reports that a two- or three-car garage can be coated in a day with polyaspartic, against two to three days for a 100% solids epoxy. The same fast cure leaves less time to fix a roller mark or a missed edge, and installers usually work in small batches.
| Your situation | Better fit | Why |
|---|---|---|
| Sun reaches the floor or the door stays open | Polyaspartic, or epoxy with a UV-stable topcoat | Standard epoxy discolors under UV |
| You cannot lose the garage for several days | Polyaspartic | About 24 hours to vehicles |
| The garage is cold | A polyaspartic rated for it | One data sheet allows 30°F; one epoxy kit stops at 50°F |
| First floor you have ever coated | Epoxy | Longer working time |
| Shaded floor and a tight budget | Epoxy | Lower price, and UV is not a concern |
| Rough floor that needs a thick build | Epoxy | Self-leveling systems can reach 1/16 to 1/8 in |
| Damp slab | Neither, until it is fixed | Vapor pressure can lift either coating |
Temperature limits: ArmorGarage polyaspartic data sheet (30 – 90°F) and Sikafloor-200 (50 – 86°F). Thickness ranges are in our floor thickness guide.
Yes, and many professional floors do. A common build uses an epoxy or polyurea base coat with flake, then a clear polyaspartic topcoat for UV and chemical resistance. Simiron's 2000PA, for example, is made to seal floors broadcast with chip or quartz. Follow the recoat window on both products. APF says surface preparation is required again once its 24-hour window passes.
Timing and limits come from manufacturer documents. Installed prices are compiled in our floor cost calculator from neutral cost guides. Seller pages are used only for product data and are labeled.
Compare epoxy and polyaspartic for your garage size and slab condition.
Turn square feet and coats into the amount to buy.
FAQ
It is better in sunlight and when you need the garage back fast. Epoxy is the better value on a shaded floor, and it is easier to install yourself. Prep and moisture control decide how long either one lasts.
Kits are sold, but the short working time makes it a hard first project. You need to mix small batches, keep a wet edge, and finish each section quickly. If you want to do the work yourself, epoxy leaves more room for mistakes.
Aliphatic polyaspartics are made to resist it. The APF and Simiron data sheets both describe their coatings as UV stable. Standard epoxy discolors under regular UV exposure, and Sika says so on its garage kit sheet.
Often, if the old coating is well bonded and the products are compatible. Sand off all the gloss, clean up the dust, and test adhesion in a small area first. A peeling floor has to come off before any new coat goes down.
Polyaspartic is a type of polyurea with a slower reaction and better UV stability. Concrete Network notes that polyurea can cure in about 10 minutes and can discolor outdoors, while polyaspartic cures a little slower and suits sunlit garages.
Related Pages
Epoxy garage floor cost: $4–$10 per sq ft installed, about $1,600–$4,000 for a 400 sq ft 2-car garage. Compare DIY kits, flake, metallic, and polyaspartic.
The real pros and cons of epoxy flooring: how long it lasts, why it peels or yellows, what it costs per year, and when another floor is the better choice.
How to epoxy a garage floor step by step: moisture test, grinding, mixing, coating, and cure times by temperature, with a timeline and a materials list.
How many pounds of flake for an epoxy floor: about 12.5 lb per 100 sq ft for a full broadcast of 1/4 in chips. Full or partial broadcast, flake size, and boxes to buy.
Epoxy floors run from about 3 dry mils per coat for water-based kits to 1/4 inch for mortar. Thickness by system in mils and mm, wet vs dry film, and what each floor needs.
Reviewed · Calculation notes and corrections